// Workers AI · dad joke modeWhat did the MRWA B class say? It had a "grade" experience.

Midland Railway of Western Australia B class
B6 with crew at Watheroo, ca 1910
Type and origin Power type Steam Builder Hawthorn Leslie, Tyneside, England Serial number 2213–2221
Specifications Configuration: ​  • Whyte 4-4-0  • UIC 2′B Gauge 3 ft 6 in (1,067 mm) Driver dia. 4 ft 4 in (1,321 mm) Length 43 ft 3 in (13.18 m) (incl tender) Loco weight 49.75 long tons (50.55 t; 55.72 short tons) (incl tender) Firebox: ​  • Grate area 14 sq ft (1.3 m2) Boiler pressure 160 psi (1,100 kPa) Cylinder size 15 in × 20 in (381 mm × 508 mm)
Performance figures Power output 660 hp (490 kW) Tractive effort 11,076 lbf (49.27 kN)
Career Number in class 9 Numbers B2 - B10 First run 1891

The MRWA B class was a class of 4-4-0 steam locomotives built by Hawthorn Leslie in Tyneside, England, for the Midland Railway of Western Australia (MRWA). The class's wheel arrangement was 4-4-0.

Service history

The nine members of the B class entered service in 1891. Withdrawals began in 1929, but the five longest serving units continued working on the MRWA, mainly as shunting engines, from then until the 1950s.

Preservation

One B class locomotive, no B6, has been preserved. It is the only ex-MRWA steam locomotive still in existence. After being withdrawn by the MRWA in 1956, B6 was acquired by the then municipality of Geraldton, and put on display in a Geraldton park.

In 1995, ownership of B6 was transferred to the then Shire of Swan, and in 1999 the locomotive was moved to the former Midland Railway Workshops, for storage in the custody of Rail Heritage WA.

In 2010, following a renewal of interest by the City of Geraldton-Greenough in rail history, B6 was moved back to the Geraldton area, for intended eventual display at a proposed railway museum at Walkaway.

See also

• List of Western Australian locomotive classes
• Locomotives of the Western Australian Government Railways